Match the order given in column (I) with the property(les) in column (II). {:("ColumnI","ColumnII"),((A)Rb_2CO_3gtK_2CO_3gtNa_2CO_3,(p)"Solubility of salts in water"),((B)SrSO_4gtCaSO_4gtMgSO_4,(q)"Thermal stability of salts"),((C )RbgtKgtNa,(r)"Softness of metals"),((D)BegtMggtCa,(s)"Hydration energy of metals"),(,(t)"Ionisation energy of metals "):}

Match the order given in column (I) with the property(les) in column (

1.	Match the order given in column (I) with the property(les) in column (II). {:("ColumnI","ColumnII"),((A)Rb_2CO_3gtK_2CO_3gtNa_2CO_3,(p)"Solubility of salts in water"),((B)SrSO_4gtCaSO_4gtMgSO_4,(q)"Thermal stability of salts"),((C )RbgtKgtNa,(r)"Softness of metals"),((D)BegtMggtCa,(s)"Hydration energy of metals"),(,(t)"Ionisation energy of metals "):}
Answer» Solution :(A)Down the group the DECREASE in the lattice ENERGY is more as compared to that of HYDRATION energy with increase in size of cations.So the solubility order is correct.Similarly the thermal stability of the oxo-salts increases with increase in metallic character.So the thermal stability order is correct. (B)The correct order of solubility is `MgSO_4 gt CaSO_4 gt SrSO_4` as in this case decrease in hydration energy is more as compared to that of lattice energy. The orde of thermal stability is correct, as down the group metallic character increases and thus the thermal stability of oxo-salts increases. (C )Down the group strength of metallic bond decreases Due to this there occurs a decrease in CLOSE packing of atoms in crystal lattice from LI to Cs and thus softness increase donw the group. (D)hydration energy `prop 1/ ("size of atom")`So BegtMggtCa is correct order. Ionisation energy `prop 1/("Size of atom")` So BegtMggtCa is correct order.